This plant provides multiple barriers against bacteriological contamination. Bacteriological testing is carried out on raw water, treated water and distribution samples on a regular frequency. On-line analyses for chlorine residuals and turbidity ensure continuous monitoring of water leaving the plant. Chlorine levels in the distribution system are also checked on a regular basis. More specialized testing occurs monthly and quarterly checking for pesticides, heavy metals, disinfection by-products, volatiles and organics.